Automatically threading loom shuttle



Dec. 15,193, w. A. TEBO AUTOMATICALLY THREADING LOOM SHUTTLE Filed May 1, 1936 INVENTOR. MLL/Af? A. 77550.

AM 7 W ATTORNEY.

Patented Dec. 15, 1936 UNITED STATES AUTOMATICALLY THREADING .LOOM

SHUT

TLE

William A. Tebo, Anthony, B. 1., assignor to Draper Corporation, Hopedale, Mass, a corporation of Maine Application May 1, 1936, Serial No. 77,392

5 Claims.

The present invention pertains to automatically threading loom shuttles, and has more particular reference to the threading devices of such shuttles.

Shuttles of the type to which the invention pertains are comprised of a shuttle body having a threading block which has a longitudinal thread passage and a horn which projects from the front of the threading block outwardly and rearwardly above the thread passage. The filling thread becomes threaded into the thread passage below the horn during the first pick after transfer and is intended to be guided by the hornforwardly and downwardly into a side delivery eye at the beginning of the second pick after transfer. In view of the possibility of the filling becoming unthreaded from beneath the horn instead of threading into the delivery eye, it is desirable that the shuttle be provided with means to hold the filling against unthreading and thereby insure its threading into the delivery eye.

It is an object of the present invention to provide a shuttle of the type mentioned, which shuttle shall have'a thread trapping member fixed in a groove in the shuttle body and provided in its top surface with a concavity to receive a depending lug from the underneath side of the horn, the concavity and lug permitting the filling thread to pass from the rear to the front side of the lug and trapping member but preventing the reverse, or unthreading, movement of the filling.

The aforementioned and other objects of the invention are accomplished by the construction illustrated on the accompanying drawing, of

which:

Fig. 1 is a plan view of the thread delivery end of a shuttle comprising the preferred embodiment of the invention;

Fig. 2 is a view in cross-section, taken approximately on line 2-2 of Fig. 1, but to .a larger scale; and

Fig. 3 is a view in cross-section, taken approximately on line 33 of Fig. 2.

The shuttle shown on the drawing is comprised of a shuttle body I having a longitudinally extending cavity 2 for reception of a filling carrier, such as bobbin 3, and certain threading devices to be hereinafter described. The filling carrier is releasably held in the shuttle body and is automatically replaced by a new one whenever the filling -supply becomes substantially exhausted, as is well known in the art.

The threading devices include a side delivery eye formed in the shuttle body at 4, and a threading block fixed in a recess 5 in the shuttle body. The threading block has a longitudinally extending thread passage in alignment with the cavity 2, the thread passage being defined in part by the walls of the recess 5 and in part by the fioor band the frontv and rear walls 1 and 8 of the threading block. The threading block has a horn 9 which projects from the front wall I outwardly and rearwardly above the thread passage. The

shuttle body is provided with a groove l0 which forwardly is in a direction from the top of the sheet of drawings toward the bottom thereof on Fig. 1, and outwardly is in a direction from the cavity toward the tip ll of the shuttle.

The transfer of a filling carrier into the cavity 2 occurs at a time when the shuttle is boxed as just described. Immediately after transfer, the filling end. 1 extends from the filling carrier outwardly and upwardly, over the threading block, to the usual fixed holder (not shown). Thereafter, the shuttle is moved bodily rearwardly and then picked in a direction toward the left, Fig. 1. As; the shuttle is picked, the filling unwinds from the filling carrier and in unwinding swirls or balloons about in a manner to become threaded down into the thread passage and bethreading of the filling at the end of the first or beginning of the second pick after transfer.

The modification which I have made in the threading block consistsin the provision of a lug l2 which depends from the underneath surface of. thehorn 9. In the particular embodiment shown, the lug is provided by merely turning the rearward free end of the horn downwardly. The rear face l3 of the lug is preferably inclined downwardly and forwardly, while the front face of the lug may be vertical.

The thread trapping member of the present invention is conveniently comprised of a screw M which is threaded into the shuttle body at the bottom of the groove I0, whereby it is vertically adjustable. The screw extends upwardly from the bottom of the groove and has its head l5 positioned directly beneath the lug I2. The

headhas a concavity in its upper surface, which screw extends rearwardly from the slot to the rear wall I! of the groove l0 (Fig, 3) to thereby form a shelf which prevents the filling from moving downwardly behind the screw.

It will be apparent that as the shuttle is first picked after transfer the filling will move rearwardly and downwardly about the rearward end of the horn 9 and will then be thrown or pulled against the inclined surface I3. The filling will thus be guided forwardly through the slot and will assume a running position in the groove Iii forwardly of the screw and lug, in which position the filling is shown on Fig. 3.

The filling threads into the position just described very early in the first pick after transfer, and it continues to run in that position throughout the remainder of the pick. At the end of the first pick, the shuttle is moved bodily forwardly and rearwardly and then picked in the opposite direction. The lug i2 and the thread trapping member prevent the filling from unthreading about the horn when it is slackened by the movements of the shuttle at the end of the first pick and beginning of the second pick after transfer. Consequently, during the second pick, the filling will be guided by the horn through the passage l8 and down into the side delivery eye, in the desired manner.

Having fully disclosed the preferred embodiment of my invention, I claim:

1 An automatically threading loom shuttle comprising a shuttle body having a cavity for receiving a filling carrier, a threading block fixed in a recess in said shuttle body, said threading block having a longitudinally extending thread passage in alignment with said cavity and a horn which projects from the front of the threading block outwardly and rearwardly above said thread passage, said shuttle body having a groove extending longitudinally outwardly from said recess and thread passage, a thread trapping member carried by said shuttle body in said groove beneath said horn, said member projecting from the bottom of said groove upwardly and having a concavity formed in its top surface, and a lug depending from the underneath side of said horn and terminating in said concavity, there being space in the concavity around the lower end of said lug to permit a filling thread to pass from the rear to the front side of said lug and member.

2. An automatically threading loom shuttle comprising a shuttle body having a cavity for receiving a filling carrier, a threading block fixed in a recess in said shuttle body, said threading block having a longitudinally extending thread passage in alignment with said cavity and a horn which projects from the front of the threading block outwardly and rearwardly above said thread passage, said shuttle body having a groove extending longitudinally outwardly from said recess and thread passage, 2. thread trapping member in said groove, said member projecting upwardly from the bottom of said groove and having a concavity formed in its top surface beneath said horn, and a lug depending from the underneath side of said horn and terminating in said concavity, there being open space in said concavity around the lower end of said lug and the rear face of said lug being inclined downwardly and forwardly, to guide a filling thread from the rear to the front side of said lug and member.

3. An automatically threading loom shuttle comprising a shuttle body having a cavity for receiving a filling carrier, a threading block fixed in a recess in said shuttle body, said threading block having a longitudinally extending thread passage in alignment with said cavity and a horn which projects from the front of the threading block outwardly and rearwardly above said thread passage, said shuttle body having a groove extending longitudinally outwardly from said recess and thread passage, a screw threaded into said shuttle body at the bottom of said groove, said screw having a slotted head positioned beneath said horn, and a lug depending from the underneath side of said horn and terminating in the slot in said screw head, there being space in said slot around the lower end of said lug to permit a filling thread to pass from the rear to the front side of said screw and lug.

4. An automatically threading loom shuttle comprising a shuttle body having a cavity for receiving a filling carrier, a threading block fixed in a recess in said shuttle body, said threading block having a longitudinally extending thread passage in alignment with said cavity and a horn which projects from the front of the threading block outwardly and rearwardly above said thread passage, the rearward end of said horn being turned downwardly in the form of a depending lug, said shuttle body having a groove extending longitudinally outwardly from said recess and thread passage, a screw threaded into said shuttle body at the bottom of said groove, the head of said screw having a concavity in which the lower end of said lug is received, there being space in said concavity around the lower end of said lug to permit a filling thread to pass from the rear to the front side of said lug and screw, the head of said screw etxending rearwardly from said concavity to the rear wall of said groove in the form of a shelf to prevent the filling from moving downwardly behind said screw.

5. An automatically threading loom shuttle comprising a shuttle body having a cavity for receiving a filling carrier, a threading block fixed in a recess in said shuttle body, said threading block having a longtiudinally extending thread passage in alignment with said cavity and a horn which projects from the front of the threading block outwardly and rearwardly above said thread passage, the rearward end of said horn being turned downwardly in the form of a depending lug, said shuttle body having a groove extending longitudinally outwardly from said recess and thread passage, a screw threaded into said shuttle body at the bottom of said groove, the head of said screw being positioned beneath said horn and having a longitudinally extending slot in which the lower end of said lug is received, there being space in said slot around the lower end of said lug and the rear face of said lug being inclined downwardly and forwardly, to guide a filling thread from the rear to the front side of said lug and screw, the head of said screw extending rearwardly from said slot to the rear wall of said groove in the form of a shelf to prevent the filling from moving downwardly behind the screw.

WILLIAM A. TEBO. 

